| 摘要 |
PURPOSE:To enable the obtaining of an optical tape better both in recording/ reproduction characteristic and tape running property by specifying an average roughness at the center line of a surface desired to form a recording layer of an intermediate layer between a base film and the recording layer while the average roughness at the center line of a surface on the side opposite to the intermediate layer forming surface of the base film is specified. CONSTITUTION:Average roughness is set below 50Angstrom at the center line of a surface desired to form a recording layer of an intermediate layer between a base film 3 and the recording layer 2 while the average roughness is set at 50-1000Angstrom at the center line of a surface on the side opposite to the intermediate layer forming surface of the base film 3. In other words, the base film 3 herein used is preferably 100-1000Angstrom in the center line average roughness and the intermediate layer is provided on the side of the recording layer forming surface to reduce the center line average roughness. Material herein used for the base film is a resin such as polyethylene terephthalate, polyimide, polyvinyl chloride or polycarbonate. This enables the obtaining of an optical tape better both in recording/reproduction property and tape running property. |
